My Inquiry
My Account
Texas Instruments OPA684IDBVR
- Part No.:
- OPA684IDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
OPA684IDBVR.pdf
- Description:
- IC OPAMP CFA 1 CIRCUIT SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,037
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
OPA684IDBVR from Texas Instruments is a low-power, current-feedback operational amplifier with disable control, designed for high-bandwidth video and signal conditioning applications. It delivers 120MHz bandwidth at G = +10, –78dBc 2nd-harmonic distortion at 5MHz (RL ≥ 1kΩ), ±4V output swing on ±5V supplies, and 1.7mA quiescent current - enabling broadcast video drivers and ADC input stages in space- and power-constrained systems.
For engineers reviewing the OPA684IDBVR datasheet, OPA684IDBVR pinout, OPA684IDBVR application, or OPA684IDBVR equivalent, key selection considerations include its CFBplus architecture's gain-independent bandwidth, 100µA shutdown current, SOT-23-6 package footprint, and verified performance in NTSC composite video (0.04% differential gain, 0.02° differential phase) under ±5V operation.
Technical Context
The OPA684IDBVR implements a patented CFBplus architecture featuring an internally closed-loop input buffer stage that linearizes inverting-input impedance, minimizing gain-dependent bandwidth roll-off and harmonic distortion. This enables stable 120MHz small-signal bandwidth up to G = +10 and < 0.1dB gain flatness to 14MHz at G = +2.
Its dual-supply (±2.5V to ±6V) or single-supply (+2.8V to +12V) operation is supported by supply-independent biasing, while the DIS pin provides TTL-compatible enable/disable control with 40ns turn-on time and 4ms disable time - critical for power-gated video signal paths and portable instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal Bandwidth (G = +10) | 120MHz - supports full HD video baseband (≈160MHz Nyquist) with margin for filter roll-off. |
| 2nd-Harmonic Distortion (5MHz, RL ≥ 1kΩ) | –78dBc - meets broadcast-grade video linearity requirements (dG/dP < 0.05%/0.05°). |
| Output Current (Sourcing) | 160mA min - drives 100Ω loads to ±4V swing, enabling doubly-terminated 50Ω cable driving. |
| Quiescent Current | 1.7mA max (±5V) - enables battery-powered video interfaces and multi-channel summing amps. |
| Disable Current | 100µA max - reduces system standby power without external switchers or LDOs. |
| Input Voltage Noise | 3.7nV/√Hz - preserves SNR in ADC driver and low-noise preamp stages. |
| Rise Time (G = +2) | 3ns - ensures sub-10ns pulse fidelity for digital video clock distribution and test equipment. |
Pinout & Package
SOT-23-6 package (DBV), 2.9mm × 1.6mm footprint, 0.95mm height, thermal resistance θJA = 150°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier Output | Low-impedance voltage source capable of sourcing/sinking >100mA into 100Ω loads. |
| 2 (–VS) | Negative Supply Rail | Connects to ground (single-supply) or negative rail (dual-supply); must be bypassed with 0.1µF ceramic. |
| 3 (+IN) | Noninverting Input | 50kΩ || 2pF input impedance; DC-biased at VCM = ±3.75V (±5V supply) for full swing operation. |
| 4 (DIS) | Disable Control (Active-Low) | Pull ≤1.5V to enter shutdown (IQ < 100µA); open or >3.4V for normal operation. |
| 5 (–IN) | Inverting Input | 2.5Ω linearized feedback node; sets closed-loop gain via RF/RG ratio in current-feedback topology. |
| 6 (+VS) | Positive Supply Rail | Accepts +2.8V to +12V (single) or ±2.5V to ±6V (dual); requires local 0.1µF + 6.8µF bypassing. |
Key Features
| Feature | Design Value |
|---|---|
| CFBplus Architecture | Internally buffered inverting input maintains <1% bandwidth variation from G = +1 to +20 - eliminates gain-compensation redesign. |
| NTSC Video Performance | 0.04% differential gain / 0.02° differential phase at G = +2 - qualifies for professional broadcast camera front-ends. |
| Single-Supply Operation | Operates from +2.8V to +12V with 1.25V input headroom and 1.0V output headroom - enables direct interface to 3.3V/5V logic and ADCs. |
| Fast Enable/Disable | 40ns enable time and 4ms disable time - supports dynamic power gating in multi-channel video routers and FPGA I/O banks. |
| High Output Drive | ±4VPP swing into 100Ω on ±5V supplies - eliminates need for external current boosters in 75Ω/150Ω video line drivers. |
Applications
| Professional Broadcast Video Drivers | ADC Input Drivers |
|---|---|
Use Scenario: Driving multiple 75Ω coaxial video lines from a studio camera head to recording or switching equipment. IC Role / Device Role / Timing Role: Final-stage current-feedback video buffer with gain-of-2 configuration and DC coupling. Use Value: Delivers 0.04% dG/0.02° dP across 4 parallel 150Ω video loads - meets SMPTE 259M-C compliance without external equalization. | Use Scenario: Buffering high-speed analog sensor outputs (e.g., CCD, medical imaging) into 12–14-bit SAR or pipeline ADCs. IC Role / Device Role / Timing Role: Low-noise, low-distortion input driver with matched 50Ω source termination and 100Ω load drive. Use Value: 3.7nV/√Hz input noise and –78dBc 2nd-harmonic distortion preserve ENOB >11.5 bits at 5MHz input frequency. |
| SAW Filter Post-Amplifiers | Multichannel Summing Amplifiers |
Use Scenario: Amplifying narrowband RF/IF signals after surface-acoustic-wave (SAW) bandpass filtering in wireless receivers. IC Role / Device Role / Timing Role: High-gain, low-noise post-filter amplifier operating at G = +10 with minimal peaking (≤6.3dB at G = +1). Use Value: 120MHz bandwidth at G = +10 enables amplification of 40–80MHz IF bands without gain-dependent phase shift or group delay variation. | Use Scenario: Summing outputs from 4–8 precision DACs in waveform generation or beamforming systems. IC Role / Device Role / Timing Role: Inverting-summing node with 2.5Ω virtual ground and wideband response to maintain channel-to-channel timing alignment. Use Value: 104MHz bandwidth at G = +20 allows simultaneous summation of >50MHz signals with <1° phase skew across channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA691IDBVR | Higher slew rate (1800V/µs vs 820V/µs), 500MHz bandwidth, 4.5mA IQ - trades power for speed. | Required for >200MHz IF amplification or ultrafast pulse shaping where OPA684IDBVR bandwidth is limiting. | Select OPA691IDBVR only when >300MHz small-signal bandwidth or >1000V/µs slew rate is mandatory; otherwise OPA684IDBVR offers better power efficiency. |
| OPA683IDBVR | Lower IQ (1.1mA), reduced bandwidth (80MHz at G = +10), same SOT-23-6 package - optimized for ultra-low-power video. | Suitable for battery-powered portable monitors or low-data-rate video links where 120MHz bandwidth is excessive. | Choose OPA683IDBVR when system-level power budget restricts IQ to <1.2mA and bandwidth ≤80MHz suffices for target resolution. |
Compared with OPA691IDBVR, the OPA684IDBVR delivers 40% lower quiescent current at 60% of the bandwidth - ideal for multi-channel video systems where thermal density and board area constrain higher-power alternatives. Against OPA683IDBVR, it adds 40MHz bandwidth and 30% higher output current for minimal IQ penalty.
Availability
OPA684IDBVR is available at Aetrix Electronics and suitable for professional broadcast video drivers, ADC input stages, SAW filter post-amplifiers, and multichannel summing amplifiers requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for OPA684IDBVR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and digital signal technologies with over 50 years of innovation in high-performance op amps and data converters.
The OPA684IDBVR belongs to TI's CFBplus current-feedback amplifier product line, engineered specifically for low-power, high-fidelity video signal routing, precision instrumentation, and high-speed data acquisition systems demanding gain-stable bandwidth and ultra-low distortion.
FAQ
What is the maximum recommended supply voltage for OPA684IDBVR?
The OPA684IDBVR supports a maximum operating voltage range of ±6V for dual-supply configurations or +12V for single-supply operation, as specified in the Absolute Maximum Ratings table. Exceeding ±6.5V on either rail risks permanent damage. For reliable long-term operation, TI recommends staying within ±6V or +12V limits, with typical characterization performed at ±5V and +5V.
Does OPA684IDBVR support true single-supply operation down to 2.8V?
Yes, the OPA684IDBVR is fully characterized for single-supply operation from +2.8V to +12V. At +2.8V, it maintains functional operation with 1.25V input headroom and 1.0V output headroom, delivering usable gain-of-2 performance into 100Ω loads. Electrical specifications at +2.8V are provided in the datasheet's "ELECTRICAL CHARACTERISTICS: VS = +5V" section with appropriate derating notes.
What is the function of the DIS pin on OPA684IDBVR, and how should it be interfaced?
The DIS pin on OPA684IDBVR is an active-low disable control. Pulling it to ≤1.5V disables the amplifier, reducing supply current to <100µA and placing all I/O pins in high-impedance state. Leaving it open or holding it ≥3.4V enables normal operation. No external pull-up is required; the internal bias ensures safe default operation when left unconnected.
Can OPA684IDBVR drive a 75Ω video load directly in a broadcast application?
Yes, the OPA684IDBVR can directly drive a 75Ω video load in broadcast applications. Its 160mA sourcing capability and ±4V output swing on ±5V supplies deliver >1.5VPP into 75Ω with <0.04% differential gain error and <0.02° differential phase error - meeting SMPTE 259M-C requirements for standard-definition video. A series 10Ω resistor is recommended for optimal impedance matching.
How does the CFBplus architecture of OPA684IDBVR improve bandwidth stability versus conventional CFB op amps?
The CFBplus architecture in OPA684IDBVR uses an internally closed-loop input buffer to linearize the inverting-input impedance, reducing its sensitivity to gain-setting resistor variations. This results in <5% bandwidth change from G = +1 to +20 - compared to >30% degradation in legacy CFB amplifiers - enabling predictable, gain-independent frequency response for video equalizers and programmable-gain stages.
OPA684IDBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 820V/µs
- Gain Bandwidth Product:
- 1.9 GHz
- -3db Bandwidth:
- 210 MHz
- Current - Input Bias:
- 5 µA
- Voltage - Input Offset:
- 1.5 mV
- Current - Supply:
- 1.7mA
- Current - Output / Channel:
- 160 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
OPA684IDBVR FAQ
1.How can I place an order for OPA684IDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA684IDBVR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for OPA684IDBVR reliable?
The price and inventory of OPA684IDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA684IDBVR is usually 5 days.
3.What payment methods are accepted for OPA684IDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA684IDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA684IDBVR?
OPA684IDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA684IDBVR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for OPA684IDBVR?
For technical support, including OPA684IDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA684IDBVR requirements.
6.How does Aetrix verify that OPA684IDBVR is sourced from the original manufacturer or authorized distributors?
All OPA684IDBVR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that OPA684IDBVR meets industry standards.
7.What is the process for return or replacement of OPA684IDBVR?
All OPA684IDBVR units undergo pre-shipment inspection (PSI). If there is an issue with OPA684IDBVR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The OPA684IDBVR part is unused and in its original packaging.
Return procedure for OPA684IDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA684IDBVR Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
